WO2021008231A1 - Chariot à outils pliable - Google Patents

Chariot à outils pliable Download PDF

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Publication number
WO2021008231A1
WO2021008231A1 PCT/CN2020/091590 CN2020091590W WO2021008231A1 WO 2021008231 A1 WO2021008231 A1 WO 2021008231A1 CN 2020091590 W CN2020091590 W CN 2020091590W WO 2021008231 A1 WO2021008231 A1 WO 2021008231A1
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WO
WIPO (PCT)
Prior art keywords
rotating
rod
rotating member
wheel
fixed
Prior art date
Application number
PCT/CN2020/091590
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English (en)
Chinese (zh)
Inventor
闵航
Original Assignee
闵航
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 闵航 filed Critical 闵航
Publication of WO2021008231A1 publication Critical patent/WO2021008231A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/02—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible
    • B62B3/022—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible folding down the body to the wheel carriage or by retracting projecting parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B5/00—Accessories or details specially adapted for hand carts
    • B62B5/06—Hand moving equipment, e.g. handle bars
    • B62B5/067—Stowable or retractable handle bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/12—Collapsible wheels

Definitions

  • the utility model relates to a tool cart, in particular to a folding tool cart.
  • Tool cart is a commonly used cargo transportation tool. When not in use, stacking takes up a lot of space, and the bottom of the tool cart has wheels, which makes stacking very unstable.
  • the utility model provides a folding tool cart.
  • the handle and the wheel can be synchronously expanded or folded in one action; the structure is simple, the operation is convenient, and the stability in the expanded state is high to overcome the defects of the prior art.
  • the utility model provides a folding tool cart, which includes a bottom plate, a driving rod, a horizontal rod, a first wheel rotating assembly and a first wheel assembly; one end of the driving rod is rotatably connected with the bottom plate, and the connecting position of the driving rod and the bottom plate has an L shape Structure;
  • the horizontal rod is fixed on the bottom plate;
  • the first wheel rotating assembly includes a first fixing part, a first rotating part and a first elastic part;
  • the first fixing part is on the horizontal rod and fixed on the horizontal rod;
  • the first fixing part There are several straight surfaces evenly distributed on the circumference of one end surface, the number of which is not more than four; the straight surface is parallel to the horizontal rod; two adjacent straight surfaces are connected by an inclined surface, and the inclined surface is also evenly distributed on the circumference;
  • a rotating piece is sleeved on the horizontal rod, one end is attached to the end of the L-shaped structure; the other end of the first rotating piece also has several straight surfaces and several three inclined surfaces evenly distributed on the circumference; the
  • the present invention provides a folding tool cart, which may also have the following features: the driving rod rotates around the bottom plate, the L-shaped structure leaves the end of the first rotating member; the first elastic member extends and resets to push the first rotating member away from the first rotating member A fixed piece; at the same time the first elastic piece is reset and twisted, driving the first rotating piece to twist 90 degrees; thereby driving the first wheel assembly fixedly connected with the first rotating piece to rotate 90 degrees.
  • the present invention provides a folding tool cart, which may also have the following characteristics: the driving rod rotates in the opposite direction around the bottom plate, and the end of the L-shaped structure pushes the first rotating member to move closer to the first fixed member; When the inclined surface of the first fixing member is attached to the inclined surface, the first elastic member is still being squeezed. At this time, the inclined surface of the first rotating member continues to rotate 90 degrees along the inclined surface of the first fixing member, and the straight surface of the first rotating member It coincides with the straight surface of the first fixing member, that is, the end surface of the first rotating member is completely attached to the end surface of the first fixing member, and the first elastic member is twisted by 90 degrees; the first wheel assembly fixedly connected to the first rotating member is reversed Rotate 90 degrees.
  • the present invention provides a folding tool cart, which may also have the following features: it further includes a second wheel rotating assembly, a second wheel assembly and a linkage rod; the second wheel rotating assembly includes a second floating part and a second rotating part And a second elastic member; the second floating member is sleeved on the horizontal rod; the second floating member can be connected to the horizontal rod floating; one end surface of the second floating member has a number of circular arc tooth peaks and arc tooth valleys evenly distributed on the circumference , The two are staggered; the number of arc tooth peaks is not more than four; the second rotating part is sleeved on the horizontal rod; one end of the second rotating part matches the end surface of the second floating part, and it also has several arcs evenly distributed on the circumference The tooth peak and the arc tooth valley are also staggered; the arc tooth peak of the second rotating part can be embedded in the arc tooth valley of the second floating part, and the arc tooth valley of the second rotating part can be embedded in the second floating part
  • the present utility model provides a folding tool cart, which may also have the feature that the second floating member has an oblong hole, and the pin passes through the oblong hole and then is fixed on the horizontal rod, so that the second floating member and the horizontal rod can be Floating connection.
  • the present invention provides a folding tool cart, which may also have the feature that the first rotating member moves away from the first fixed member and rotates at the same time, and drives the linkage rod and the second rotating member fixed together to move in the same way; The arc tooth peak and the arc tooth valley between the second rotating part and the second floating part are separated, and the second wheel assembly fixed on the linkage rod rotates.
  • the present invention provides a folding tool cart, which may also have the feature that the first rotating member moves close to the first fixed member and rotates in the opposite direction, driving the linkage rod and the second rotating member fixed together to act likewise ;
  • the arc tooth peak of the second rotating member first meets the arc tooth peak of the second floating member, the second floating member is moved by force, the second elastic member is compressed; the second rotating member continues to rotate, the second rotating member
  • the arc tooth peaks turn to the opposite positions of the arc tooth valleys of the second floating member, and the two are completely attached;
  • the second elastic member applies force to the second floating member to drive the opposite surface of the second rotating member and the second floating member Fit;
  • the linkage rod rotates 90 degrees to drive the second wheel assembly fixed on it to rotate in reverse.
  • the present invention provides a folding tool cart, which may also have the following characteristics: the driving part is two vertical rods of the handle; a horizontal rod, a first wheel rotating assembly, a first wheel assembly, a second wheel rotating assembly, The number of the second wheel assembly and the linkage rod is two; each horizontal rod, the first wheel rotation assembly, the first wheel assembly, the second wheel rotation assembly, the second wheel assembly and the linkage rod are a set, which is arranged on the bottom plate One side; two horizontal rods are connected by a connecting rod to form a U-shaped guide rail.
  • the utility model provides a folding tool cart, which may also have the following features: it also includes a handle locking assembly; the handle locking assembly includes a lock rod and two lock springs; the back of the L-shaped structure at the bottom of the vertical rod has a lock respectively Slot; Two locking springs are respectively arranged on both sides of the two vertical rods, one end is respectively sleeved on both ends of the lock rod, and the other end is respectively fixed on the bottom plate; Pull the lock rod to move out of the lock groove, the handle can be pressed to the bottom plate to rotate; lock Under the force of the locking spring, the rod is close to the bottom of the two vertical rods of the handle; when the handle is pulled up, the vertical rod rotates back to a vertical state, and the lock rod is embedded in the lock groove under the force of the locking spring.
  • the present invention provides a folding tool cart, which may also have the following characteristics: the bottom plate includes a bottom plate body and two connecting plates; the two connecting plates are fixed on both sides of the bottom plate body; each connecting plate is perpendicular to the bottom plate body There are two parallel surfaces in the L-shaped structure; the two L-shaped structures are respectively embedded in the two parallel surfaces of the two connecting plates; one end of the two horizontal rods is embedded in the guide rod groove, and the L-shaped structure The structure is hinged.
  • Fig. 1 is a perspective view of a folding tool cart in an unfolded state.
  • Fig. 2 is a perspective view of the folding tool cart in a folded state.
  • Fig. 3 is a perspective view of the unfolded state of the folding tool cart after the base body is removed.
  • Fig. 4 is an enlarged view of part Z1 in Fig. 3.
  • Fig. 5 is an enlarged view of part Z2 in Fig. 3.
  • Fig. 6 is a perspective view of the folding tool cart in a folded state after the base body and the handle are removed.
  • Fig. 7 is an enlarged view of part D1 in Fig. 6.
  • Fig. 8 is an enlarged view of part D2 in Fig. 6.
  • Fig. 9 is an exploded view of the first rotating assembly in a folded state.
  • Fig. 10 is an exploded view of the second rotating assembly in a folded state.
  • Fig. 11 is a perspective view of the folding state of the folding tool cart with the bottom plate body removed.
  • Fig. 12 is an enlarged view of part S in Fig. 11.
  • Fig. 1 is a perspective view of a folding tool cart.
  • the folding tool cart includes: a bottom plate 100, a handle 200, a U-shaped rail 300, two first wheel rotating assemblies 400, two first wheel assemblies 400, and two first wheel assemblies 400.
  • the two first wheel assemblies 400 are rear wheels, which are respectively arranged on both sides of the folding tool cart.
  • the two second wheel assemblies 700 are front wheels and are respectively arranged on both sides of the folding tool cart.
  • the first wheel set 400 and the second wheel set 700 on the front side in FIG. 1 are taken as an example for description.
  • the first wheel set 400 and the second wheel set 700 on the rear side are arranged symmetrically with the front side. That is, the direction of rotation is opposite, and the other structures and folding principles are exactly the same, so the description will not be repeated.
  • the bottom plate 100 includes a bottom plate body 110 and two connecting plates 120.
  • the two connecting plates 120 are fixed on both sides of the bottom plate body 110 by fasteners such as screws and nuts.
  • the connecting plate 120 can be integrally formed with the bottom plate body 110.
  • the bottom plate 100 is configured to be manufactured in two parts, the connecting plate 120 and the bottom plate body 110, in order to simplify the processing technology of the bottom plate 100.
  • the connecting plate 120 has two parallel surfaces 121 perpendicular to the base body 110.
  • the handle 200 is composed of two vertical rods and a cross rod, which is the same as the handle of a common tool cart. However, as shown in FIG. 4, the bottoms of the two vertical rods are L-shaped structures 210.
  • the L-shaped structure 210 has a guide rod groove 211 therein.
  • the two L-shaped structures 210 are respectively embedded in the two parallel surfaces 121 of the two connecting plates 120.
  • Both ends of the U-shaped guide rail 300 are respectively embedded in the guide rod grooves 211 of the L-shaped structure 210.
  • the pin 51 penetrates the two parallel surfaces 121, the L-shaped structure 210 and the U-shaped rail 300, thereby hingedly connecting the three to realize the fixation of the U-shaped rail 300 and the bottom plate 100, and the handle 200 can be connected to the bottom plate 100 and the U-shaped rail 300. Rotate the connection.
  • the U-shaped guide rail 300 is composed of two horizontal rods 310 and a connecting rod 320 connecting the two guide rail straight rods 310.
  • One end of the two horizontal rods 310 that is, both ends of the U-shaped guide rail 300 are embedded in the guide rod groove 211, and the U-shaped guide rail 300 and the handle 200 are rotatably connected by the pin 51 and the L-shaped structure 210, and the U-shaped guide rail 300 and the handle 200 are rotatably connected by the pin 51 and the connecting plate
  • the 120 hinge realizes the fixed connection between the U-shaped guide rail 300 and the bottom plate 300.
  • a through hole 330 is opened, and is fixedly connected to the bottom plate body 110 by bolts and nuts.
  • the first wheel rotating assembly 400 includes: a first fixing part 410, a first rotating part 420 and a first elastic part 430.
  • the first fixing member 410 is sleeved on the horizontal rod 310 of the U-shaped rail 300, and is fixed on the horizontal rod 310 of the U-shaped rail 300 by the interference fit of the pin 52.
  • the first fixing member 410 is composed of two cylindrical shapes.
  • One end surface of the first fixing member 410 has a straight surface 411 evenly distributed around the circumference, and the straight surface 411 is parallel to the horizontal rod 310.
  • Two adjacent straight surfaces 411 are connected by an inclined surface 412.
  • the three inclined surfaces 412 are also evenly distributed on the circumference.
  • the first rotating member 420 is sleeved on the horizontal rod 310 of the U-shaped guide rail 300, and one end is attached to the end of the L-shaped structure 210 of the handle 200.
  • the other end of the first rotating member 420 also has three straight surfaces 421 and three inclined surfaces 422 evenly distributed around the circumference.
  • the three straight surfaces 421 and the three inclined surfaces 422 of the first rotating member 420 are matched with the three straight surfaces 411 and the three inclined surfaces 412 of the first fixing member 410, respectively, and can fit together.
  • the first elastic member 430 is arranged between the first fixing member 410 and the first rotating member 420, and the two ends of the first elastic member 430 are also twisted by 90 degrees (90 degrees is the theoretical angle, and a certain amount can be set in practical applications.
  • the amount or tolerance angle can be greater than 90 degrees) and fixed on the first fixing member 410 and the first rotating member 420 respectively, that is, one end is inserted into the circumference of the first fixing member 410, and the other end is inserted into the circumference of the first rotating member 420 Therefore, the elastic member 430 not only has the elastic force in the length direction, but also has the torsion force.
  • the second wheel rotating assembly 600 includes a second floating member 610, a second rotating member 620 and a second elastic member 630.
  • the second floating member 610 is sleeved on the horizontal rod 310 of the U-shaped rail 300.
  • the second floating member 610 has an oblong hole 613, and the pin passes through the oblong hole 613 and the hole on the horizontal rod 310 to achieve a floating fixation on the horizontal rod 310 of the U-shaped guide 300.
  • the floatable amount of the second floating member 610 is the movable range of the oblong hole 613 on the pin.
  • one end surface of the second floating member 610 has circular arc tooth peaks 611 and circular arc tooth valleys 612 evenly distributed on the circumference, which are arranged in a staggered manner.
  • the second rotating member 620 is sleeved on the horizontal rod 310 of the U-shaped rail 300.
  • One end of the second rotating member 620 matches the end surface of the second floating member 610, and also has circular arc tooth peaks 621 and circular arc tooth valleys 622 evenly distributed on the circumference, and the two are also staggered.
  • the arc tooth peak 621 of the second rotating member 620 can be embedded in the arc tooth valley 612 of the second floating member 610, and the arc tooth valley 622 of the second rotating member 620 can be inserted into the arc tooth peak 611 of the second floating member 610 in.
  • the two opposite surfaces of the second rotating member 620 and the second floating member 610 can be completely attached.
  • the second elastic member 630 is sleeved on the horizontal rod 310 of the U-shaped rail 300, one end is pressed against the pin at the position of the through hole 330, and the other end is pressed against the other end surface of the first floating member 610, driving the second floating member 610 toward the second The rotating member 620 moves.
  • One end of the second elastic member 630 can also be fixed on the horizontal rod 310 of the U-shaped guide rail 300 by other methods, such as welding.
  • the first wheel assembly 500 includes: a first wheel support 510 and a first wheel 520.
  • the first wheel bracket 510 is fixed at one end of the linkage rod 800, so as to realize the fixed connection between the first wheel bracket 510 and the first rotating member 420.
  • the first wheel 520 and the first wheel support 510 are rotatably connected by pins.
  • the second wheel assembly 700 includes: a second wheel support 710 and a second wheel 720.
  • the second wheel support 710 is fixed at the other end of the linkage rod 800, so as to achieve a fixed connection between the second wheel support 710 and the second rotating member 620.
  • the second wheel 720 and the second wheel support 710 are rotatably connected by pins.
  • the folding tool cart may further include a handle locking assembly 900.
  • the handle locking assembly 900 includes a locking rod 910 and two locking springs 920.
  • the backs of the two vertical L-shaped structures 210 of the handle 200 have lock grooves 220 respectively.
  • the bottom edge of the lock groove 220 to the L-shaped structure 210 is an arc 230.
  • Two locking springs 920 are respectively arranged on both sides of the two vertical rods, one end is respectively sleeved at both ends of the lock rod 910, and the other end is respectively fixed on the two connecting plates 120 by the pins 53, that is, fixed to the base body 110 together.
  • the lock rod 910 can be inserted into the lock slot 220.
  • the arc tooth peak 621 and the arc tooth valley 622 of the second rotating member 620 are respectively attached to the arc tooth valley 612 and the arc tooth peak 611 of the second floating member 610, and the two second wheel assemblies 700
  • the second wheel 720 is circumferentially attached to the ground and can roll on the ground.
  • the position of the L-shaped structure 210 of the handle 200 is rotated around the pin 51, and the handle is attached to the bottom plate 100.
  • the end of the L-shaped structure 210 rotates, the force pressing on one end of the first rotating member 420 is cancelled, and the first elastic member 430 stretches and resets to push the first rotating member 420 to move to the left while driving the first rotating member 420 twisted 90 degrees.
  • the first rotating member 420 drives the linkage rod 800 to rotate counterclockwise, thereby driving the first wheel bracket 510 to rotate 90 degrees, and finally realizes that the first wheel 520 rotates 90 degrees and is folded under the bottom plate 100.
  • the first rotating member 420 moves to the left while rotating counterclockwise, driving the linkage rod 800 fixed with it to perform the same action, thereby driving the linkage rod 800 that is also fixed to the linkage rod 800.
  • the upper second rotating member 620 also moves to the left while rotating counterclockwise.
  • the arc tooth peaks and arc tooth valleys between the second rotating member 630 and the second floating member 610 are separated, and the second wheel bracket 710 fixed on the linkage rod 800 moves to the left synchronously and rotates counterclockwise to turn the second wheel 720 closed.
  • the end of the L-shaped structure 210 pushes the first rotating member 420 to move to the right, and when the first elastic member 430 is compressed, the first rotating member 420 gradually approaches the first fixing member 410.
  • the inclined surface 422 of the first rotating member 420 is attached to the inclined surface 412 of the first fixing member 410, the first elastic member 430 is still being squeezed.
  • the inclined surface 422 of the first rotating member 420 follows the first fixing member 410.
  • the inclined surface 412 rotates clockwise until the straight surface 421 of the first rotating member 420 and the straight surface 411 of the first fixing member 410 overlap, that is, the end surface of the first rotating member 420 and the end surface of the first fixing member 410 are completely attached.
  • An elastic member 430 is twisted by 90 degrees, as shown in Fig. 7 to Fig. 4 state changes.
  • the first rotating member 420 moves to the right and rotates clockwise, driving the linkage rod 800 fixed with it to move to the right and rotating clockwise, thereby driving the second rotating member 620 also fixed on the linkage rod 800 to the right Move and rotate clockwise, as shown in Figure 8 to Figure 5 state changes.
  • the arc tooth peak 621 of the second rotating member 620 first hits the arc tooth peak 611 of the second floating member 610, the second floating member 610 is forced to move to the right, and the second elastic member 630 is compressed.
  • the second rotating member 620 continues to rotate, and the arc tooth peak 621 of the second rotating member 620 turns to the opposite position of the arc tooth valley 612 of the second floating member 610, and the two can be completely attached.
  • the second elastic member 630 exerts a leftward force on the second floating member 610, driving the second rotating member 620 and the second floating member 610 to face the opposite surfaces.
  • the linkage rod 800 rotates 90 degrees to drive the first wheel bracket 510 and the second wheel bracket 710 fixed on it to rotate 90 degrees, so that the first wheel 520 and the second wheel 720 rotate 90 degrees clockwise, and can be on the ground after unfolding scroll.
  • first wheel rotating assembly 400 and the second rotating assembly 600 have different structures, but the second rotating assembly 600 can adopt the structure of the first rotating assembly 400, and the technical effect can also be achieved.
  • the second rotating assembly 600 is to balance the force of the second wheel assembly and strengthen the strength of the second wheel assembly.
  • a separate first wheel rotating assembly can also drive the second wheel assembly to fold and unfold through the linkage rod 800. .
  • the folding tool cart has four front and rear wheels, and the special tool cart has two or three wheels or more than four wheels.
  • the first wheel rotating assembly can be used alone to realize the folding and unfolding of the wheels.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)

Abstract

La présente invention concerne un chariot à outils pliable. Une extrémité d'une tige d'entraînement est reliée de manière rotative à une plaque inférieure (100) et une position de liaison entre la tige d'entraînement et la plaque inférieure (100) est pourvue d'une structure en forme de L (210) ; une tige horizontale (310) est fixée sur la plaque inférieure (100) ; un premier élément fixe (410) est disposé sur la tige horizontale (310) par emmanchement et est fixé sur la tige horizontale (310) ; un premier élément rotatif (420) est disposé sur la tige horizontale par emmanchement et une extrémité du premier élément rotatif est fixée à une partie d'extrémité de la structure en forme de L (210) ; un premier élément élastique (430) est disposé entre le premier élément fixe (410) et le premier élément rotatif (420) ; lorsque le premier élément rotatif (420) et le premier élément fixe (410) correspondent l'un à l'autre, deux extrémités du premier élément élastique (430) sont respectivement fixées sur le premier élément fixe (410) et le premier élément rotatif (420) après avoir été torsadées selon un angle défini ; et un premier ensemble roue (500) tourne conjointement avec le premier élément rotatif (420). Le chariot à outils pliable présente les avantages suivants : une poignée et une roue peuvent être dépliées ou pliées de manière synchrone en une action ; la structure est simple et son fonctionnement est pratique ; et la stabilité est élevée lorsqu'il est dans un état déplié.
PCT/CN2020/091590 2019-07-15 2020-05-21 Chariot à outils pliable WO2021008231A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201921103313.4 2019-07-15
CN201921103313.4U CN210478742U (zh) 2019-07-15 2019-07-15 折叠工具车

Publications (1)

Publication Number Publication Date
WO2021008231A1 true WO2021008231A1 (fr) 2021-01-21

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Application Number Title Priority Date Filing Date
PCT/CN2020/091590 WO2021008231A1 (fr) 2019-07-15 2020-05-21 Chariot à outils pliable

Country Status (3)

Country Link
EP (1) EP3766759B1 (fr)
CN (1) CN210478742U (fr)
WO (1) WO2021008231A1 (fr)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN113057436A (zh) * 2021-03-26 2021-07-02 上海唯想实业有限公司 一种多功能拉杆背包
US11110948B2 (en) * 2019-03-29 2021-09-07 Jae Ho Song Four-wheeled folding handcart
CN113386832A (zh) * 2021-06-16 2021-09-14 上海西美工具进出口有限公司 平板车

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CN210478742U (zh) * 2019-07-15 2020-05-08 闵航 折叠工具车
CN112278684A (zh) * 2020-10-27 2021-01-29 云南财经大学 一种仓库用物流搬运装置
JP7340507B2 (ja) * 2020-10-30 2023-09-07 浅香工業株式会社 ハンドカートのキャスターの折り畳み構造及びそれを備えるハンドカート
CN113501039A (zh) * 2021-08-13 2021-10-15 广东百创源科技股份有限公司 一种联动机构及具有该联动机构的手推车
CN114348094A (zh) * 2022-01-24 2022-04-15 江苏经贸职业技术学院 一种大小可调的智能购物车
CN114516360B (zh) * 2022-02-09 2023-08-04 中国航空油料有限责任公司山东分公司 一种测试地井栓、熔断阀密封性的压力测试装置

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US4887836A (en) * 1988-08-31 1989-12-19 Command Automation, Inc. Cart with foldable side panels
CN101177106A (zh) * 2006-11-10 2008-05-14 简世坤 可收脚轮的平板车及其脚轮定位装置
CN201362271Y (zh) * 2009-03-13 2009-12-16 简世坤 一种可收合的四轮平板车
CN201432709Y (zh) * 2009-08-11 2010-03-31 简世坤 一种四轮平板车的脚轮定位收合装置
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CN109969237A (zh) * 2017-12-28 2019-07-05 东莞市全乐电动科技有限公司 一种半自动便携式四轮联动折叠小拖车
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11110948B2 (en) * 2019-03-29 2021-09-07 Jae Ho Song Four-wheeled folding handcart
CN113057436A (zh) * 2021-03-26 2021-07-02 上海唯想实业有限公司 一种多功能拉杆背包
CN113057436B (zh) * 2021-03-26 2022-05-20 上海唯想实业有限公司 一种多功能拉杆背包
CN113386832A (zh) * 2021-06-16 2021-09-14 上海西美工具进出口有限公司 平板车

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